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Find the arc length of a circle with diameter length $20$ meters if the central angle is $140$ degrees.

Leave your answer in terms of ${\pi}$.

$\cfrac{140{\pi}}{9}$ m

$\cfrac{350{\pi}}{9}$ m

$\cfrac{70{\pi}}{9}$ m

$\cfrac{70{\pi}}{3}$ m

$\cfrac{140{\pi}}{3}$ m